File and Directory Permissions Modification

Adversaries may modify file or directory permissions to evade defenses.

Cryptocurrency Miner

Makes network request to known mining pool URL.

Executes dropped EXE

Modifies sudoers policy

Writes to /etc/sudoers or a drop-in config, potentially granting passwordless root access to a user or process.

OS Credential Dumping

Adversaries may attempt to dump credentials to use it in password cracking.

Abuse Elevation Control Mechanism: Sudo and Sudo Caching

Abuse sudo or cached sudo credentials to execute code.

Checks hardware identifiers (DMI)

Checks DMI information which indicate if the system is a virtual machine.

Creates/modifies Cron job

Cron allows running tasks on a schedule, and is commonly used for malware persistence.

Creates/modifies environment variables

Creating/modifying environment variables is a common persistence mechanism.

Enumerates running processes

Discovers information about currently running processes on the system

Modifies rc script

Adding/modifying system rc scripts is a common persistence mechanism.

Modifies systemd

Adds/ modifies systemd service files. Likely to achieve persistence.

Reads hardware information

Accesses system info like serial numbers, manufacturer names etc.

Removes the immutable protection flag from a file

Uses chattr to remove the immutable flag from a file, allowing previously write-protected files to be modified or deleted.

Write file to user bin folder

Modifies Bash startup script